Convert binary 1001 to decimal, octal, hexadecimal

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Convert 1001 from binary How to convert number 1001 from binary to decimal, octal, hexadecimal?
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Binar number

1001 to decimal

conversion rule

9

conversion rule

11

1001 to hexadecimal

conversion rule

9

Binary to Decimal

Convert 1001₂ to decimal:
1001₂ = 9₁₀

binary	1	0	0	1	step 0
decimal	(1*2³) +	(0*2²) +	(0*2¹) +	(1*2⁰)	step 1
decimal 9 =	8 +	0 +	0 +	1	step 2

Binary to Octal

Convert 1001₂ to octal:
1001₂ = 1 001 = 11₈

binary 1001 1 001	1	001	step 0
octal 11	1	1	step 1

Binary to Hexadecimal

Convert 1001₂ to hexadecimal:
1001₂ = 1001 = 9₁₆

binary 1001	1001	step 0
hexadecimal 9	9	step 1

Convert other numbers:

100 101 110 111 1000 1001 1010 1011 1100 1101 1110

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